Android(安卓)WebView实现缓存

package com.hcy.trining_day6;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.Toolbar;import android.view.View;import android.webkit.WebSettings;import android.webkit.WebView;import android.webkit.WebViewClient;import android.widget.TextView;public class HomeActivity extends AppCompatActivity {//  实现缓存的路径    private static final String APP_CACHE_DIRNAME = "/webcache";    private WebView mView;    private Toolbar toobarv;    private  TextView txt;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_home);        initView();    }    private void initView() {        mView = (WebView) findViewById(R.id.mView);        txt = (TextView) findViewById(R.id.txt);        String data = getIntent().getStringExtra("data");        String title = getIntent().getStringExtra("title");        //  设置url        mView.loadUrl(data);        //  在本页面跳转浏览器        mView.setWebViewClient(new WebViewClient());        initweb();        toobarv = (Toolbar) findViewById(R.id.toobarv);        toobarv.setTitle("");        //  设置标题        txt.setText(title);        setSupportActionBar(toobarv);        //  toobar 回退箭头        getSupportActionBar().setDisplayHomeAsUpEnabled(true);        toobarv.setNavigationOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                finish();// 加finish退出应用                // 不加finish返回上一层            }        });    }//  WebView 实现缓存    private void initweb() {        WebSettings settings = mView.getSettings();        settings.setJavaScriptEnabled(true);//设置缓存模式        settings.setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);//开启DOM storage API 功能        settings.setDomStorageEnabled(true);//开启 database storage API 功能        settings.setDatabaseEnabled(true);        String cachePath = getFilesDir().getAbsolutePath() + APP_CACHE_DIRNAME;//设置数据库缓存路径        settings.setAppCachePath(cachePath);        settings.setAppCacheEnabled(true);        mView.reload();    }}
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